This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $483 fare is the cheapest current round-trip from Seattle (SEA) to GSP on Southwest flight WN662, departing 2026-08-14 at 05:15 with return on 2026-08-15.

Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count.